Brief view of Green Sandpiper, a first. Used pencil for first time in a while, allowing me to finish painting accurately after bird was flushed out of sight by Lapwing. Differences from common are lack of white shoulder, striking white eye ring and white chequers along edge of covert/wing feathers (not shown here). At least 2 green and 2 common. Flat light turned water surface into white mirror. Generally noticed, light is turning towards more dramatic direction of winter time.